506
FNCA52 TJSJ 080730
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
330 AM AST SAT AUG 8 2026
DISCUSSION
CRITICAL FUEL CONDITIONS PERSIST ACROSS THE ISLANDS, WITH EXTREME
DROUGHT CONDITIONS ACROSS PORTIONS OF THE SOUTHERN COASTAL PLAINS
OF PUERTO RICO. AS A DRIER AIR MASS CONTINUES TO FILTER INTO THE
REGION, MOISTURE CONTENT WILL DROP SIGNIFICANTLY, WITH RH VALUES
BETWEEN 47 AND 50 PERCENT, WELL BELOW THRESHOLDS. DUE TO CRITICAL
FUEL CONDITIONS ACROSS THE SOUTHERN AREA OF THE ISLAND AND KDBI
VALUES WELL ABOVE THRESHOLDS, THE FIRE DANGER THREAT REMAINS
ELEVATED. THEREFORE, A FIRE DANGER STATEMENT IS IN EFFECT FROM
10 AM THROUGH 5 PM AST. RESIDENTS AND VISITORS ARE ENCOURAGED TO
AVOID OUTDOOR BURNING, AS CONDITIONS WILL LIKELY BE FAVORABLE FOR
WILDFIRE IGNITION AND RAPID SPREAD.
PRZ014-082000-
SOUTHEAST COASTAL PLAINS-
330 AM AST SAT AUG 8 2026
TODAY TONIGHT SUN
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS NONE SHOWERS
CHANCE PRECIP (%) 10 0 10
TEMP (24H TREND) 92 (+1) 74 (-2) 92
RH % (24H TREND) 46 (-7) 91 (+5) 48
WIND 20FT/EARLY(MPH) E 16 E 16 E 18
WIND 20FT/LATE(MPH) E 18 NE 11 E 21
MIXING HGT(FT-AGL/MSL)5680 6330
TRANSPORT WND (MPH) E 18 E 25
VENT RATE (KT-FT) 90880 139260
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ015-082000-
SOUTHERN HILLS-
330 AM AST SAT AUG 8 2026
TODAY TONIGHT SUN
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 10 20
TEMP (24H TREND) 90 (+4) 70 (-3) 89
RH % (24H TREND) 52 (-8) 98 (+7) 58
WIND 20FT/EARLY(MPH) E 12 E 13 E 14
WIND 20FT/LATE(MPH) E 13 NE 13 E 17
MIXING HGT(FT-AGL/MSL)6690 6750
TRANSPORT WND (MPH) E 17 E 24
VENT RATE (KT-FT) 100350 141750
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ016-082000-
NORTH COASTAL PLAINS-
330 AM AST SAT AUG 8 2026
TODAY TONIGHT SUN
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 10 20
TEMP (24H TREND) 91 (+1) 74 (-3) 91
RH % (24H TREND) 60 (-4) 99 (+7) 63
WIND 20FT/EARLY(MPH) E 14 E 19 E 18
WIND 20FT/LATE(MPH) E 21 E 13 E 23
MIXING HGT(FT-AGL/MSL)5270 5640
TRANSPORT WND (MPH) E 20 E 25
VENT RATE (KT-FT) 89590 124080
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ017-082000-
NORTHERN HILLS-
330 AM AST SAT AUG 8 2026
TODAY TONIGHT SUN
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS TSTMS
CHANCE PRECIP (%) 20 10 30
TEMP (24H TREND) 89 (+1) 72 (-1) 89
RH % (24H TREND) 61 (-3) 99 (+2) 67
WIND 20FT/EARLY(MPH) E 13 E 17 E 17
WIND 20FT/LATE(MPH) E 19 E 12 E 20
MIXING HGT(FT-AGL/MSL)7060 5820
TRANSPORT WND (MPH) E 16 E 23
VENT RATE (KT-FT) 98840 116400
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ018-082000-
WEST COAST-
330 AM AST SAT AUG 8 2026
TODAY TONIGHT SUN
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS TSTMS
CHANCE PRECIP (%) 40 30 50
TEMP (24H TREND) 92 (+1) 72 (-2) 92
RH % (24H TREND) 57 (-5) 98 (+4) 61
WIND 20FT/EARLY(MPH) E 12 E 16 E 17
WIND 20FT/LATE(MPH) E 13 E 14 E 18
MIXING HGT(FT-AGL/MSL)5170 5550
TRANSPORT WND (MPH) E 10 E 16
VENT RATE (KT-FT) 46530 77700
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ019-082000-
EASTERN INTERIOR-
330 AM AST SAT AUG 8 2026
TODAY TONIGHT SUN
CLOUD COVER PCLDY PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 30 20
TEMP (24H TREND) 91 (+3) 72 (-3) 90
RH % (24H TREND) 56 (-4) 98 (+6) 62
WIND 20FT/EARLY(MPH) E 13 E 13 E 14
WIND 20FT/LATE(MPH) E 14 E 13 E 16
MIXING HGT(FT-AGL/MSL)6810 6990
TRANSPORT WND (MPH) E 17 E 23
VENT RATE (KT-FT) 102150 139800
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ022-082000-
LUQUILLO MOUNTAIN RANGE-
330 AM AST SAT AUG 8 2026
TODAY TONIGHT SUN
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 40 20
TEMP (24H TREND) 86 (+4) 70 (-3) 86
RH % (24H TREND) 64 (-6) 100 (+6) 69
WIND 20FT/EARLY(MPH) E 12 E 11 E 13
WIND 20FT/LATE(MPH) E 12 E 10 E 13
MIXING HGT(FT-AGL/MSL)4500 5390
TRANSPORT WND (MPH) E 20 E 24
VENT RATE (KT-FT) 76500 113190
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ023-082000-
CENTRAL MOUNTAIN RANGE-
330 AM AST SAT AUG 8 2026
TODAY TONIGHT SUN
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 50 30 50
TEMP (24H TREND) 88 (+5) 68 (-3) 87
RH % (24H TREND) 60 (-8) 99 (+3) 68
WIND 20FT/EARLY(MPH) E 10 E 12 E 12
WIND 20FT/LATE(MPH) E 12 E 11 E 17
MIXING HGT(FT-AGL/MSL)8370 6950
TRANSPORT WND (MPH) E 13 E 22
VENT RATE (KT-FT) 92070 132050
DISPERSION 5 5
DSI 6 2 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ024-082000-
CAYEY MOUNTAIN RANGE-
330 AM AST SAT AUG 8 2026
TODAY TONIGHT SUN
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 20 20
TEMP (24H TREND) 86 (+2) 71 (-2) 85
RH % (24H TREND) 61 (-4) 100 (+4) 70
WIND 20FT/EARLY(MPH) E 11 E 11 E 13
WIND 20FT/LATE(MPH) E 12 E 11 E 16
MIXING HGT(FT-AGL/MSL)5580 6180
TRANSPORT WND (MPH) E 20 E 25
VENT RATE (KT-FT) 94860 135960
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ025-082000-
VIEQUES-
330 AM AST SAT AUG 8 2026
TODAY TONIGHT SUN
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 30 20
TEMP (24H TREND) 91 (+2) 77 (-3) 91
RH % (24H TREND) 60 (+1) 92 (+9) 61
WIND 20FT/EARLY(MPH) E 16 E 18 E 17
WIND 20FT/LATE(MPH) E 17 E 18 E 17
MIXING HGT(FT-AGL/MSL)3440 3230
TRANSPORT WND (MPH) E 21 E 24
VENT RATE (KT-FT) 61920 67830
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ026-082000-
CULEBRA-
330 AM AST SAT AUG 8 2026
TODAY TONIGHT SUN
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 30 20
TEMP (24H TREND) 91 (+2) 78 (-3) 91
RH % (24H TREND) 63 (-2) 94 (+10) 63
WIND 20FT/EARLY(MPH) E 16 E 18 E 17
WIND 20FT/LATE(MPH) E 16 E 17 E 17
MIXING HGT(FT-AGL/MSL)3410 3320
TRANSPORT WND (MPH) E 22 E 25
VENT RATE (KT-FT) 64790 73040
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ027-082000-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
330 AM AST SAT AUG 8 2026
TODAY TONIGHT SUN
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 10 30
TEMP (24H TREND) 92 (+2) 73 (-3) 92
RH % (24H TREND) 50 (-7) 93 (+5) 53
WIND 20FT/EARLY(MPH) E 18 E 14 E 18
WIND 20FT/LATE(MPH) SE 19 E 12 E 24 G31
MIXING HGT(FT-AGL/MSL)5170 6420
TRANSPORT WND (MPH) E 18 E 20
VENT RATE (KT-FT) 82720 109140
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ001-082000-
SAINT THOMAS AND SAINT JOHN-
330 AM AST SAT AUG 8 2026
TODAY TONIGHT SUN
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 30 10
TEMP (24H TREND) 89 (+2) 77 (-3) 90
RH % (24H TREND) 64 (0) 95 (+12) 65
WIND 20FT/EARLY(MPH) E 16 E 18 E 17
WIND 20FT/LATE(MPH) E 17 E 18 E 17
MIXING HGT(FT-AGL/MSL)3360 3290
TRANSPORT WND (MPH) E 21 E 26
VENT RATE (KT-FT) 60480 75670
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ002-082000-
ST CROIX-
330 AM AST SAT AUG 8 2026
TODAY TONIGHT SUN
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 20 20
TEMP (24H TREND) 89 (+1) 77 (-3) 90
RH % (24H TREND) 64 (0) 95 (+12) 64
WIND 20FT/EARLY(MPH) E 14 E 18 E 17
WIND 20FT/LATE(MPH) E 17 E 18 E 17
MIXING HGT(FT-AGL/MSL)4480 5210
TRANSPORT WND (MPH) E 20 E 28
VENT RATE (KT-FT) 76160 125040
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
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